AI agent attention shattering

For the library I'm working on I finally getting the power of running multiple agents in parallel. The problem I discovered is that the ping that the agent sends when the job is done is affecting my attention span, like chat app or email pings. A while ago Boris Cherny, who created Claude Code, mentioned on X that he had 8 tabs with agents open. The question I have is how many of those tabs are forgotten for days or even longer? I found out 4 agents running in parallel is my maximum, while maintaining a workflow that is not doing work between job-done-pings.